Avaya Definity SI, Maintenance Manual, Page: 1827 / 2968

MAPD-BD (MAPD Interface Circuit Pack TN802)
Issue 4 May 2002 10-1041 555-233-123
PSTN fallback feature
The Public Switched Telephone Network (PSTN) fallback feature is available on
the Internet trunk application software, which periodically pings the remote
destinations that the software calls. When the far end returns a poor response
time to the ping, DEFINITY’s ARS or AAR network routing patterns bypass those
ports and direct the call to another port, typically on a PSTN trunk.
When the remote destinations show acceptable response times to subsequent
pings, the corresponding ports are returned to “idle,” where they are available for
service.
Cabinet configuration
Because of overheating, the TN802 circuit pack should not be placed directly
above or below another MAPD circuit pack.
UPS protection
Because Windows NT is more vulnerable to damage from a power interruption
than the Avaya DEFINITY Server, uninterrupted power supply (UPS) protection is
strongly recommended for systems using the TN802 circuit pack.
Table 10-378. Restore TN802 administration data
Step Description Comments
1. Restore IP
Trunk
administration At the Windows NT desktop, double-click on the IP Trunk
Back UP Restore icon.
The IP Trunk Backup/Restore Utility screen appears.
2. Select utility In the IP Trunk Backup/Restore Utility dialog screen, click
Files, Restore.
The IP Trunk Backup screen appears
3. Select restore In the IP Trunk Backup screen, click on the Restore button.
4. Wait Wait until the yellow Disk-In-Use LED (Note 5 in Figure
10-64 on page 10-1042 ) light is out.